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Finding the Fourth Proportional to 471, 705.24 and 379.20

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Solution

The fourth proportional to 471, 705.24 and 379.20 is: 567.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    471 : 705.24 = 379.20 : x
  2. Step 2: Convert to fraction form
    471/705.24 = 379.20/x
  3. Step 3: Cross multiply
    471x = 705.24 × 379.20
  4. Step 4: Simplify right side
    471x = 267,427.01
  5. Step 5: Solve for x
    x = 267,427.01/471
  6. Step 6: Final answer
    x = 567.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.